Thread-protector for pipe.



J. T. DUFF. THREAD PROTECTOR POB. PIPE.

APPLICATION FILED oe'1\24,1ee7.

9 1 2,944. Patented Feb. 16, 1909,

To all fwhom'it may concern:

riifrnirr onirica.

Unirnn sriirns JUHN l`. DUFF, UF il'lj'lSllUllG, PENNSYLVANIA.

THREAD-PROTECTOR FOR PIPE.

Be it known that l, Jouw T. Duur, a citizen ot t-lie United States, residing at Pitts burg, in the county of lAllegheny and State of Pennsylvania, have invented certain newA and useful linproveiiicnts in 'l`hi'ead-Protcctors for Pipe; and I do declare the following to be a. fu the invention, suoli as will eiiableothers skilled in the art to which itappertains toA make and use the saine, reference being had to theaccompanying drawings, and to the figures of reference niarked thereon, which form a part of this specification.

This invention relates to a new article of manufacture and it comprises a tlireadvproteetoi' for pipo or tubes, 'and it consists oi' a thin strip of metal bentin the forni ot aring, nieaiis for attaching the iiieeiin' ends oi' said strip, a lining composed of' a yielt ing' and ilexi ble substance att-ached within said ring, means for holding said lining in position, and the invention further consists in the details -of construction and combination oi` parts, as

will be-fully described hereinafter.

In the shipment of wrought iron or steel pipes or tubing having threaded ends, it is necessary to protect said threads against injury. .This has been done by short sections of threaded pipe screwed over the threads 'and in various other ways. To avoid this threading of the protector and to forni the same in such ina-nner that it will not be neces saryto screw the roteotor on or oli the pipo, is t e principal o ject ol my 'present invention. i

Anotherobject of the inventionis to so form the protector, that the same may be pressed or driven en the endl of the pipe and to provide a means whereby said protector may be easily. removed from the pipe.

1n the accompanying drawings ,-liigure i is a perspective view of my improved thread tang or tongue formed on `the other end of said stri Fig 4 is a plan View of the other end of .t ie strip, showing the tongue lor engage- ,inent with theslot oi the opposite end.

Specification ofLetters Patent. Application tiled October 24, 1907. l SerielNo. 398,924.

l, clear, and exact description of Patented Feb. 16, 1909.

To put niy invention into practice, and thereby forni a thread protector that may be driven or pressed u on thc ends of pipe for protection, l provide a thinstripol" sheet metal of a suitable width and lentlito suit the diaiiieterof the pipe for whicbh it is ins tended, and -form one end thereof with a tongue 3, and the other end with a slot 2, suitable for entering said tongue, and bendingthe saine backward to form a hook when the two ends of' the strip 1 are brought together,`to forni said str1 in annular form, as will be best seen by reference to Fig. 1', of the drawings. Prior to bending the strip 1 into annular forni, a strip of corrugated so yielding flexible substance, such as soft rubbei', tell., cloth or suitable paper, of the same length as the strip 1, but o iiiented or otherwise attached to the inner side ot said strip 1, and the edges of the inetallie strip 1 flan ed or bont over (as at 4, Fig. 2) to engage wit i tho edges of the rubber or other soljt yielding material 5. These flanged edges '-1,' ol' the ring strengthen andstiien the.

article when in annular form and `at'the same time serve as a further ineans'i of confining the lining 5, and holding the saine rigidly in place. j l

These protectors, constructed as above less width, is codescribed, are ola greater diameter at one side than the other,to form a tapering inside' surface to corres )ond to the taper formed on the threaded end are intended.

Iii operation, the'v rotector is simply driven or pressed over t ic threads ofthe pipe and when it is desired to remove said protector, the tongue bent hack to its normal position, at. which tinie the protector may be easily removed.

'Various slight modifications and changes may be iiiade in the details oi` construction without de 'iartiiig from the'v spirit of thc iiiveiition. 'l`herel`ore l do not wish to confine myself to the construction, shown and described, hnt `wish to claim all such -inodiiied forms as will come properly within the 'general scope of' the invention.

Having thus described my invention, what 1 claim, and desire to secure by Letters Patent, is

A. thread protector for pipes com rising an outer casing formed from a stripe` sheet metal, a flexible tongue and a slot. for attaching the ends ol` said strip to form a rin and said ring being slightly tapered, a lining within said casing and adhcsivej/ seemed to yact :md retain the lining from displaenw En testimony when-i0?,

in presence o" tw@ wissefs.

-hc .zme face thereof, apposite anges can med by the casing und bont mwadly t@ cun- 

